Ink



Patented Sept. 29, 1931 UNITED s r-Ares PATENT OFFICE EDWARD W. BILL, OFCHICAGO, ILLINOIS, ASSIGNOR TO A. Bl DICK COMPANY, 01 CHICAGO, ILLINOIS,A CORPORATION OF ILLINOIS INK No Drawing.

The object of this invention is to provide an ink which, While capableof otheruses, shall be particularly adaptable for use upon fast printingstencil-duplicating machines 5 such as the rotary mimeograph and thelike. For such use or uses the ink herein disclosed possesses certainimportant advantages, among which are that it will not dry or cake uponpads or rollers, it will dry or set quickly upon the impression sheet,it will produce excellent prints through all of the various types ofstencils now in common use, it may be easily and cheaply compounded andas easily and cheaply modified with respect to color or, in adapting itto different types of machines, with respect to consistency.

In carrying out the invention I employ, preferably as the majorconstituent, rosin oil, adding to this a (preferably) smaller quantityof a sulphonated oil such as Turkey red oil and a (preferably) stillsmaller quantity of a hydro-carbon oil such as parafiin oil. To themixture so constituted, I add a substantial quantity of water and asuitable quantity of dye or pigment to produce the desired color. Thequantity of water employed may be varied according to the strength orgrade (quantity of fatty matter content) of the Turkeyred oil. In fact,all to of the ingredients may be varied substantially without noticeabledetriment to the resulting mixture. Excellent results may be obtained byemploying a formula having approximately the following proportions,

as i. e.,-

Parts by weight 120 rosin oil.

90 I Turkey red oil. 10 paraffin oil. water.

17 carbon on the market under the trade name Superba'i Soluble Oil. Thismay also be employed 6 as a reducer, being combined with the com-Application filed May 1, 1923. Serial No. 635,978.

pound either by stirring therein or by bein ground therewith. The termTurkey red oi m the claims covers of course, known equivalents thereof.

What I claim is 1. Anink for stencil-duplicating machines, comprisingrosin oil, Turkey red oil, paraflin o1l, water and coloring matter, agreater percentage of rosin oil being present than Turkey red oil and agreater percentage of go Tllirkey red oil being present than parafiin o12. An ink for stencil duplicating machines comprising relatively largequantities each of rosin oil and Turkey red oil, the two com- 55 binedconstituting about two-thirds of the ink, a quantity of parafiin oilequivalent to about hve percent of said combined oils, water andcoloring matter.

This specification signed this 28th day of 7 April, 1923.

EDWARD W. HILL.

